Hello
Anyone who has experience with operating a bidirectional DC-power supply as a load. I have an "ITECH6006C-500-40" and plan to operate a set-up with two motors as described in the simple sketch attached. I was primarily wondering if can directly just connect the 3-phase rectifier bridge (https://no.rs-online.com/web/p/bridge-rectifiers/0462130/) between the generator and the DC-supply(sink)? Are there any need to reduce the ripple output of the rectifier? I tried to simulate a simplified model in Simulink where I had the load represented by a resistor or a current source. See attached figure. The input current is alternating, though it does have harmonics.
best regard
Sveinung Attestog
The nominal speed of my 4-pole motors are 3000 rpm. So the output voltage wil have a frequency of 100 Hz and after passing through the rectifier the ripple will have a fundamental frequency of 600 Hz. This exceeds the maximum frequecy of 200 Hz the DC-supply/sink can handle, which the maufacture ITECH recently informed me. So the filter is needed to recude the voltage ripple. But when I set a capacitor across the rectifer DC output terminals, the input current gets amplitude peaks that is 2 to 3 times larger than the average value of the output current. I also obsered this with experiment.
Is there a filter which is less harsh on the input? Smaller pk-pk amplitude and less smaller harmonics magnitudes relative to the fundamental component.
The attaced figure show the input (yellow) and output (blue) of voltage (top) and current (bottom). The output/load current is set by a current source.
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